github.com/migueleliasweb/helm@v2.6.1+incompatible/pkg/getter/httpgetter.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors All rights reserved.
     3  Licensed under the Apache License, Version 2.0 (the "License");
     4  you may not use this file except in compliance with the License.
     5  You may obtain a copy of the License at
     6  
     7  http://www.apache.org/licenses/LICENSE-2.0
     8  
     9  Unless required by applicable law or agreed to in writing, software
    10  distributed under the License is distributed on an "AS IS" BASIS,
    11  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  See the License for the specific language governing permissions and
    13  limitations under the License.
    14  */
    15  
    16  package getter
    17  
    18  import (
    19  	"bytes"
    20  	"fmt"
    21  	"io"
    22  	"net/http"
    23  
    24  	"k8s.io/helm/pkg/tlsutil"
    25  	"k8s.io/helm/pkg/urlutil"
    26  )
    27  
    28  //httpGetter is the efault HTTP(/S) backend handler
    29  type httpGetter struct {
    30  	client *http.Client
    31  }
    32  
    33  //Get performs a Get from repo.Getter and returns the body.
    34  func (g *httpGetter) Get(href string) (*bytes.Buffer, error) {
    35  	buf := bytes.NewBuffer(nil)
    36  
    37  	resp, err := g.client.Get(href)
    38  	if err != nil {
    39  		return buf, err
    40  	}
    41  	if resp.StatusCode != 200 {
    42  		return buf, fmt.Errorf("Failed to fetch %s : %s", href, resp.Status)
    43  	}
    44  
    45  	_, err = io.Copy(buf, resp.Body)
    46  	resp.Body.Close()
    47  	return buf, err
    48  }
    49  
    50  // newHTTPGetter constructs a valid http/https client as Getter
    51  func newHTTPGetter(URL, CertFile, KeyFile, CAFile string) (Getter, error) {
    52  	var client httpGetter
    53  	if CertFile != "" && KeyFile != "" {
    54  		tlsConf, err := tlsutil.NewClientTLS(CertFile, KeyFile, CAFile)
    55  		if err != nil {
    56  			return nil, fmt.Errorf("can't create TLS config for client: %s", err.Error())
    57  		}
    58  		tlsConf.BuildNameToCertificate()
    59  
    60  		sni, err := urlutil.ExtractHostname(URL)
    61  		if err != nil {
    62  			return nil, err
    63  		}
    64  		tlsConf.ServerName = sni
    65  
    66  		client.client = &http.Client{
    67  			Transport: &http.Transport{
    68  				TLSClientConfig: tlsConf,
    69  			},
    70  		}
    71  	} else {
    72  		client.client = http.DefaultClient
    73  	}
    74  	return &client, nil
    75  }